Hoisting hook



Sept. 22, 1925. 1554,8 41

' J. CLARK H01 STING HOOK I Filed May 26, 1925 2 Sheets-Shet 1 Sept. 22, 1925.

J. CLARK HOISTING HOOK Filed May 26, 1925 2 Sheets-$hoot 2 Patented Sept. 22 1925.

JOHN CLARK, or narrate, new roan.

. norsrine HOOK.

Application filed eaj eza s i n eases To all whom it may concern: Be 1t known that 1, JO N CLARK, ac1t1- zen ofthe United States, residniglat Bufialo, in the county of Erie and State of New York, have invented new and useful Improveinents in Hoisting Hooks, of which the followingis a specification.

This invention relates to a hoisting hook which is more particularly designed for use in connection with hoisting tackle and machinery which lifts heavy loads from one place to another, such for example as freight, packages and structural mater al to and from a ship, railway car or wharf.

l-loisting hooks forthis purpose as heretofore constructed were liable to become caught against obstructions'either while as .cending or descending and the same were also liable torelease tlieiload or become unlatched therefrom, thereby .not only interfering wlth the progress of transterring the material from one placeto anotherbut also endanger ng the saiety ot the OPeratwes.

It is the object of this invention .to provide a hoistingihook'for this purposewhich is not only stronger and more durablethan those heretoforeknownbut is also not liable toitoul against adjacent obstructions and is also incapable of becoming detached from :the =.load.and thereby enable .freight ,tobe handled withmaximu n safetyto the operatives and also without any delay due to possible interferences.

In the accompanying drawings .Figure 1 is a side elevation of a hoisting hook which embodies a satisfactory form of my invention.

-Figure 2 is a front elevation of the same.

.Figure 3 is a verticallongitudinal section of the same.

Figures 4 and 5 are horizontal sections taken on the correspondingly numbered lines inFig. 3.

Figure 6 is an elevation of the tightening or clamping bolt used in connection with this: hoisting hook.

Similar characters of reference indicate like parts throughout the several views.

The, main part or body of thishoisting .hook comprises an upright shank 10 and a .forwardly and upwardly turned beak 11 at the lower end of this shank forming an up wardly opening mouth between this shank and beak which is adapted to receive the ring, rope or other means whereby the load to be lifted is attached to. the hoisting hook.

7 h t its upper end the shank is'provided with means whereby the same is connected "to the hoisting me h n 1 h Pr sen -il stance this is accomplished by means ofan eye .12 which overhangs forwardly from the upperend of the shank and receives the lowermostlink of a hoisting chainforming part of the hoisting tackle or mechanism, such as that now in common use for this purpose.

l By overhanging the attaching eye .12 forwardlythe center of gravity t m hoisting hook is brought nearly in line with the mouth of the hoisting ,hook so that the weight of the. load suspende dby the hoisting hook will be foi' ced to hang to a greater extent from the shank 1 0 and thereby relieve the 11 to a corresponding extent from this loadso .alslto reduce the liability .of breakingi the latter to aniini n n.

e t e h rne s o w twi t n r a ing-the strength of the beak, also to prevent accidental disengagement of the load from ,the mouth ofthe hoisting hook and also to prevent the hoisting" hooklfro n fouling or becoming caught against {obstructions the following means are provided Movable into out of aposition across he mo th o the h sti g oo is a k per or latch l l which ispreferably permanently connected with the upper partof the Slim- 1k while its lower end isldetacliablyconnected withtheibeak ofthe hoisting hookso asto permit of opening and closingthe mouth of the same! At its lQWer ,endthisYlatch is provided with an inwardly and upwardly Projecting oo 15 hich in [i QP lF ti position projects inwardly and upwardly fthroi'lgh an opening 16 in; the upper part of the beak 11. At its upper endthe keeperlet is provided with a curved lip 17 which is turned 1inwardly and downwardly and I forms a rounded seat.18 on the underside'of thisz ne d a e e lPeriph y 19 On h upper side of thesame. This lip also providedwith a slot 20 extending vertically throughthe same from; the under side tdthe upper side thereof.

.On the upper part otthe front side of; the shank the same provided with a forwardly P o ec in he 2 IiiC i arm d i eg al y with the shank. This log is provided with a v i l open n 22. whieh is Prefe ably r cta le a 'e square i erase s t on as 10 a. 11 in Fi -1t f a purpq e w ich W pr s nt y ap a The. numeral 23 represents the vertical body of the tightening or clamping bolt which has its central part made square in cross section and fitted in theyopening 22 of the lug 21 so as to be capable of sliding vertically therein but incapable of turning therein, and the lower part of this bolt body is arranged within the slot of the keeper so that the latter isalso incapable of turning horizontally onthis bolt body, this being accomplished by arranging the longitudinal sides of the slot parallel and close to the opposite flat sides of the bolt shank 23,

as shown in Fig. 5. At its lower end the bolt body is provided with a horizontal cross head 24, whichis of cylindrical form in cross section and engages 1ts opposite end with the shown at 2 5, and the upper side of this lug is preferably flat, as shown at 26.

The numeral 27 represents a clamping screw nut applied to the upper externally screw threaded end 28 of the bolt body and bearing with its under side against the'fiat top 26 of the lug 21. This screw nut is prevented from becoming wholly unscrewed or detached from the body of the tightening bolt by a stop device which preferably consists of a stop disk 29 overhanging the sides of the bolt body and secured to the latter by means of a screw 30. In order, however, to

permit the screw nut to be unscrewed from the bolt body a sufficient extent to release the keeper and still avoid making the bolt body unduly long the upper side of the screw nut is provided with a recess 31 which, in the I fully unscrewed position of this nut, receives the marginal part of the stop disk 29, as"

shown by dotted lines, in Fig. 3.

Preparatory to attaching this hoisting hook to a load the screw nut 27 is loosened by unscrewing the same and permitting the bolt body to drop, thereby relieving the upward pull on the keeper 14 and enabling the latter to be swung outwardly at its lower end for disengaging the hook'15 thereof from the opening 16 in the upper. end of the beak 11. In Fig. 3 the latch is represented by dotted lines in a position in which it is only swung outwardly part way, but in Fig. 1, the latch is represented by dotted lines as-h'aving'been swungoutwardly and upwardly into itsfully open position in which the mouth'of the hoisting hook is ducing a ring, rope or other. means of atcompletely uncovered and permits of intro tachment on the load to be passed into or out of the mouth of the hoisting hook.

After the ring or other attaching means on the load has been inserted in the mouth of the hook the keeper or latch 14 is swung downwardly and engaged with its hook 15 in the opening 16 in the beak 11 and then "the screw nut 27 is tightened so as to cause an upward pull of the bolt body 23 on the keeper. By this means the keeper is firmly and reliably interlocked at its lower end with the beak 11 so as to prevent accidental disengagement therefrom and the beak is also connected with the upper part of the shank 10, whereby the beak is supported and reinforced and will virtually convert the hoisting hook into a closed link and enable the hoisting hook'to carry a load approximating that capable of being carried by a closed link. While thus moving the keeper into and out of its operative position the same can only swing in a vertical plane parallel with the plane of the shank and beak of the hoisting hook, this being due to engaging the body of the tightening bolt which is square in cross section with the correspondingly shaped opening 22 and slot 20 in the lug 21 and lip 17 of the shank and keeper, whereby the latter is prevented from turning horizontally orin a plane at right angles to the plane of the shank 10 and beak 11.

The clamping bolt together with its nut and the lug in which the same is mounted are arranged almost wholly underneath the adjacent overhanging part of the inwardly attaching eye 12 of the shank 10, and the keeper or latch 14 forms a substantially even surface from the tightening means to the beak 11, thereby presenting no pronounced shoulders or surfaces on the exterior of the hoisting hook which are liable to be caught on other objects, thereby preventing the hoisting hook from becoming fouled either while loading or unloading freight or similar material and expediting this work and reducing the cost of the same accordingly.

Inasmuch as the keeper is positively locked across the mouth of the hook when the same is tightened or in its operative position this positively prevents the load which is being transported from becoming accidentally detached from the hoisting hook and thereby prevent injury to the operatives which otherwise would be liable to occur.

Furthermore all of the several parts of this hoisting hook and the closure means for the mouth of the same are permanently connected so that it is impossible for any of the parts to become detached and lost but instead maintains this hook and its attachment always in a condition ready for use. The tightening and loosening'of'the clamp ing nut 27 can be effected by turning the same either by means of an ordinary wrench applied to the fiat facets 32 on the periphcry of this nut or by inserting a wrench rod or pin into one or another of the openings 33 formed in the periphery of this nut, as

shown in F l and 2.

As a whole this hoisting hook is comparatively simple and compact in construction, it is very strong and durable and not liable to give way under the load imposed upon the same, and it can be used in connection with any of the well known or standard forms of hoisting apparatus or tackles now in common use.

I claim as my invention 1. A hoisting hook having a shank provided on its front side with a lug and a beak provided with an opening, a tightening bolt mounted lengthwise. on said lug, and a keeper movable into and out 01' a position across the mouth of said hook and pivoted at one end on said bolt and provided at its opposite end with a hook adapted to engage with said opening of the beak.

2. A hoisting hook having a shank provided on its front side with a lug and a beak provided with an opening, a tightening bolt mounted lengthwise on said lug and provided on its inner end with a cross head and on its outer end with a screw nut adapted to engage with the outer side of said lug, and a keeper movable into and out of a position across the mouth of said hook and provided at one end with an opening which receives said bolt between the head thereof and the inner side of said lug and provided at its opposite end with a hook adapted to engage with the opening of said beak.

3. A hoisting hook having a shank provided 011 its front side with a lug and a beak provided with an opening, a tightening bolt mounted lengthwise on said lug, and pro vided on its inner end with a cross head and on its outer end with a screw nut adapted to engage with the outer side of said lug, a keeper movable into and out of a position across the mouth of said hook and provided at one end with an opening which receives said bolt between the head thereof and the inner side of said lug and provided at its opposite end with a hook adapted to engage with the opening of said beak and means for preventing said screw nut from being wholly removed from said bolt.

4. A hoisting hook having a shank pro vided on its front side with a lug and a beak provided with an opening a tightening bolt mounted lengthwise on said lug and provided on its inner end with a cross head and on its outer end with a screw nut adapted to engage with the outer side of said lug, a keeper movable into and out of a position across the mouth of said hook and provided at one end with an opening which receives said bolt between the head thereof and the inner side of said lug and provided at its opposite end with a hook adapted to engage with the opening of said beak and means for preventing said screw nut from being wholly removed from said bolt consisting of a stop disk arranged on the outer end of said bolt and projecting beyond the sides thereof, and a screw connecting said bolt and disk.

5. A hoisting hook comprising a shank provided on its inner side with a lug having a rounded under side, a flat outer side and a longitudinal opening which issquare in cross section and a beak provided with an opening, a longitudinal tightening bolt having a square body arranged in said square opening, a round cross head at its inner end and an external screw thread at its outer end, a screw nut arranged on the threaded outer end of said bolt and adapted to bear against the flat outer side of said lug, and a keeper movable into and out of a. position across the mouth of said hook and having a curved upper lip which is arranged between the rounded underside of said lug and the round head of said bolt and provided with a parallel sided slot which receives the body of said bolt and said keep or being provided at its lower end with a hook adapted to engage with the opening of said beak,

JOHN omen. 

